,在原级的后面加上er,est构成比较级和最高级。

a)直接加er,est ：
b)以重读闭音节结尾的,要双写最后一个辅音字母,后加er,est：
c)以辅音字母+y结尾的,先把y改为i再加上er,est：
,在原级前加more / most.
主语+ 谓语动词+ (very/too/so/quite/) + 形/副词原级+….
如：He is very old now.(他现在很老了)
They ran quite fast.(它们跑得相当快)
The weather looks rather bad.(天气看上去相当糟)
I am so happy!(我是如此的快乐)
☆表示两者之间没有差别时,使用句型：
主语(第一个人物) + 谓语动词+ as + 形容词/副词原级+ as + 第二个人物+….
如：He is as excited as his younger sister.
(他和他妹妹一样兴奋)
Lily rode her bike as slowly as an old lady.
(莉莉骑车像老太太一样慢)
They picked as many apples as the farmers (did).
(他们摘的苹果和农民一样多)
☆表示第一个人比不上第二个人时,使用句型：
主语(第一个人物) + 谓语动词(否定式) + as / so + 形容词/副词原级+ as + 第二个人物+….
如：He is not so / as excited as his younger sister.
(他没他妹妹那么兴奋)
Lily did not ride her bike so / as slowly as an old lady.
(莉莉骑车不像老太太那样慢)
They didn’t pick so / as many apples as the farmers (did). (他们摘的
苹果不如农民多)
(2) 讲述两者有差异,第一个人物超过第二个人物时,用比较级。

基本句型：
主语(‘A’)+谓语动词+(much/a little/even/still)+形容词/副词比较级+than+第二个人物(‘B’)+….
如：A modern train is much faster than a car.
现代的火车比轿车快多了
This book didn’t cost me more than tha t one.
这本书花费我的钱不比那本多
讲述两者有差异,第一个人物不及第二个人物时,用比较级。

句型是：主语(‘A’) + 谓语动词+ less+ (多音节形/副)比较级+ than + 第二个人物(‘B’) +….
如：I think English is less difficult than maths.
(我认为英语不比数学难)
Do you think it less important to learn a foreign language?
(你认为学外语不那么重要吗？)
(3)讲述某人/物是一群之中最突出的一个时,用最高级。

句型是：
主语(sb./sth) + 谓语动词+(the) +形容词/副词最高级+in / of ….
如：The Changjiang River is the longest in China.
(长江是中国最长的河流)
He jumped (the) highest of the three (boys).
(三个男生中他跳得最高)
,则后面用副词；
如果后面是连系动词,则后面用形容词。

如：This car is the fastest of the four.(形容词)
(这辆汽车是四辆之中最快的)
This car runs (the) fastest of the four.(副词)
(这辆汽车是四辆之中跑得最快的)
2、“比较级+and+比较级”表示“越来越……”。

如：The weather is getting warmer and warmer.
(天越来越温暖了)
3、“the+比较级…,the+比较级…”表示“越…就越…”。

如：The more trees we plant,the better it will be.
(我们栽的树越多,情况就会越好)
The harder you try,the greater your progress is.
(你越是努力,进步就越大)
4、一般的形容词或副词的比较级前面可以加much/a little/even/still,而表示数量的more之前还可以加some/ any/ no/ one/ two/ many/ several/ a lot等词。

如：It is much colder today than yesterday.
(今天比昨天冷多了)
Would you like some more coffee?
(你还要些咖啡吗？)
He did not eat any more.(他没有再吃)
5、more than / less than分别可以理解为“多于/少于”,相当于副词, more than=over; less than=under
如：I lived in New York for more than four months.
(我在纽约生活了四个多月)
6、“one of the +最高级+名词(复数)”整个短语为单数含义,谓语要用单数形式。

如：One of the oldest houses has been burnt in a fire.
(最古老的一幢房子在一场大火中被烧毁了)
7、“Which / Who+动词+形/副,□,□or□?”句型中,如果有两个选项,形/副用比较级,如果有三个选项,形/副用最高级。

如：
Who has more books, Lin Tao or Han Mei?
(林涛和韩梅谁的书最多？)
Which is the heaviest,a pig,a horse or an elephant?
(猪、马、象哪个最重？)
8、上下文中含有both/either/neither/two/twins等表示两个事物的词时,用比较级,而且往往还要加the；含有all/none/no one/ every 等表示三个或三个以上事物时,用最高级。

如：
--Do you like the smaller one?—Neither.
(小一点的那个你喜欢吗？一个都不喜欢)
--Which do you like best? –All of them!
(你最喜欢哪个？全部。

)
1、This is an____book.
A. interest
B. interesting
C. interested
D. interestedly
2、The teacher is____to come.
A.the certain
B.will
C.certain
D.still
3、He has____ visited the school.
A. already
B. yet
C. still
D. often
4、He still works at the desk until____ every night.
A. latest
B. last
C. lately
D. late
5、He was three hours later than____ .
A. usually
B. usual
C. more usually
D. more usual
1.B.
2.C.
3.A.
4.D.
5.B.。